21103209

素因数分解:

$3^2\times {\mathrm{37}}^1\times {\mathrm{127}}^1\times {\mathrm{499}}^1$

素因数の和:669

約数の個数: 24

約数和(自身を含む): 31616000

約数和(自身を除く): 10512791

約数列:

[1, 3, 9, 37, 111, 127, 333, 381, 499, 1143, 1497, 4491, 4699, 14097, 18463, 42291, 55389, 63373, 166167, 190119, 570357, 2344801, 7034403, 21103209]

約数ペア:

[(1, 21103209), (3, 7034403), (9, 2344801), (37, 570357), (111, 190119), (127, 166167), (333, 63373), (381, 55389), (499, 42291), (1143, 18463), (1497, 14097), (4491, 4699)]